38 results about "Graphyne" patented technology

The invention belongs to the technical field of nano materials, and particularly relates to a nitrogen doping method and application of gamma-graphdiyne. Graphdiyne oxide is prepared through a hydrothermal method, then melamine serves as a nitrogen source, graphdiyne oxide serves as a framework, in-situ doping of nitrogen elements and reduction of graphdiyne oxide are achieved at the same time through high-temperature calcination, and the gamma-graphdiyne is obtained. The method is simple and easy to implement, the processing period is short, the doping amount is easy to control, dangerous chemicals such as concentrated sulfuric acid and concentrated nitric acid are not involved, the production safety is greatly improved, and the prepared nitrogen-doped gamma-graphdiyne has the advantages of high purity, high specific surface area, nanoscale pore diameter and excellent wave absorbing performance, gas sensitivity and ferromagnetism.

The application belongs to the technical field of biological medical materials, and discloses a polydopamine modified modified nano-graphyne and a preparation method and application thereof. In the method, the polydopamine coating is combined with the nano-graphyne for the first time to construct a GDY@PDA composite system, and the core defects of the blocky graphyne, such as easy agglomeration, poor water solubility and insufficient biocompatibility, are solved. The graphyne-based material is applied to the near-infrared two-region photothermal regulation of neural cell calcium influx for the first time, the calcium ion channel is activated through the local thermal effect of the material, and precise, remote and reversible calcium influx regulation is realized; the limitation that the traditional biocompatibility modification is easy to fall off and difficult to functionalize is broken through, the polydopamine modification makes the material have both photothermal efficiency and biological safety, and the application of the graphyne in the treatment of neural diseases (such as neural cell injury repair) is expanded.

The invention provides an amidoxime group modified graphdiyne material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing graphdiyne through in-situ growth on a template; (2) carrying out cyanation modification on the graphdiyne; and (3) carrying out amidoximation reaction on the graphdiyne subjected to cyanation modification. Before amidoximation reaction, the cyan-modified graphdiyne-template composite material can be selectively dispersed in an oxidizing agent, the template is removed through etching of the oxidizing agent, and then the amidoxime-modified graphdiyne material is prepared. According to the invention, terminal alkyne dispersed by graphdiyne is utilized, and amidoxime groups are grafted through chemical modification, so that the introduced groups are far away from one another and are distributed in a free state. The prepared amidoxime group modified graphdiyne material has excellent selectivity on uranium element, and can be used for high-selectivity seawater uranium extraction and efficient separation of uranium and vanadium elements.

The invention belongs to the technical field of biomedical materials, and discloses polydopamine modified nano graphdiyne as well as a preparation method and application thereof. According to the method, a polydopamine coating is combined with nano graphdiyne for the first time, a GDY and PDA composite system is constructed, and the core defects that blocky graphdiyne is prone to agglomeration, poor in water solubility and insufficient in biocompatibility are overcome. The graphdiynyl material is applied to near-infrared two-region photo-thermal regulation and control of nerve cell calcium internal flow for the first time, a calcium ion channel is activated through the local warming effect of the material, and accurate, remote and reversible calcium internal flow regulation and control are achieved; the limitation that traditional biocompatibility modification is easy to fall off and difficult to functionalize is broken through, the material has photo-thermal efficiency and biological safety through polydopamine modification, and the application of graphdiyne in nerve disease treatment (such as nerve cell damage repair) is expanded.

The application discloses a borohydride / graphyne composite hydrogen storage material, a preparation method thereof and application of the borohydride / graphyne composite hydrogen storage material in the field of hydrogen storage. The borohydride / graphyne composite hydrogen storage material comprises a graphyne carrier and borohydride loaded on the carrier. The preparation method comprises the following steps: adding the graphyne into a homogeneous solution of the borohydride and performing ultrasonic dispersion, then removing part of the solvent in a state of keeping the graphyne suspended to form a paste, and finally removing the solvent by vacuumizing to obtain the borohydride / graphyne composite hydrogen storage material. The graphyne is used as the carrier, so that the stability of the borohydride in the hydrogen absorption and release cycle can be ensured. The borohydride / graphyne composite hydrogen storage material has low hydrogen release initial and peak temperatures, good hydrogen absorption and release kinetic performance and high hydrogen absorption and release reversibility.

The invention develops an axial weak coordination synthesis method for regulating and controlling a cobalt phthalocyanine molecular metal d band center based on a graphdiyne topological structure. The method is characterized in that a series of graphdiyne two-dimensional interfaces with different topological structures are obtained by regulating and controlling the arrangement and proportion of sp-and sp-hybridized carbon atoms, and the adsorption configuration of cobalt phthalocyanine molecules along the graphdiyne topological structure two-dimensional interfaces is regulated by utilizing the d-pi action between sp-carbon and a cobalt metal center. The weak coordination regulation effect of sp-carbon on the d band center of cobalt phthalocyanine metal is realized. In the process of preparing hydroxylamine from nitrate through electro-catalysis, the adsorption energy of hydroxylamine at the Co-N4 site is reduced through the axial weak coordination effect of sp-carbon; sp-carbon can be used as a transfer station for catalyzing nitrate to nitrite to assist the nitrite to be reduced into hydroxylamine at the cobalt phthalocyanine Co-N4 site, so that a full-chain series catalytic mechanism is formed.

The present application relates to the technical field of oxygen reduction catalyst, in particular to a kind of metal single-atom doped nanocarbon material catalyst and its preparation method and application.In the present application, nitrogen-containing ligand is first coordinated with metal salt to form M-N bonding complex, which can improve the proportion of effective M-N active sites, and then the graphdiyne is mixed with M-N complex, which can limit the complex in molecular pores, so that the metal atom is atomically dispersed, and finally a single-atom doped graphdiyne-based oxygen reduction catalyst material is obtained.

A hydrogen gas storage tank includes a body including a metallic bulk region and one or more protective layers adjacent to the bulk region. One or more of these protective layers comprise a number of graphyne molecules such that the one or more protective layers are configured to lower hydrogen adsorption into the bulk region when compared to a bulk region with protective layers free from graphyne.

This invention discloses a method for preparing two-dimensional chiral graphyne via terminal alkyne coupling. The method uses a chiral graphyne framework as the building block and hexaethynylbenzene and chiral terminal alkyne monomers as co-building units. By optimizing the catalytic system (a combination of copper-based catalyst and organic base) and controlling key process parameters such as coupling reaction time, a one-pot in-situ construction of two-dimensional chiral graphyne is achieved. This invention significantly shortens the synthetic route, greatly simplifies the processing steps, and avoids damage to the intrinsic conjugated framework of graphyne during post-modification processes, providing a new approach for obtaining structurally complete and stable two-dimensional chiral graphyne materials.

This invention provides a method for preparing graphyne with all rhombic molecular channels, comprising: S1 ultrasonically cleaning a copper foil in a hydrochloric acid solution to obtain a pretreated copper foil substrate; S2 placing the pretreated copper foil substrate in a double-necked flask containing a palladium catalyst, adding a reaction solvent, and refluxing to obtain an activated copper foil substrate; S3 adding a polybrominated benzene and a magnetic particle sequentially to another double-necked flask, placing the activated copper foil substrate in the flask, and then adding a reaction solvent to obtain a reaction system; S4 dissolving the polyyneylbenzene in the reaction solvent to obtain a first mixed solution, adding the first mixed solution to the reaction system for synthesis to obtain graphyne with all rhombic molecular channels. By using trisubstituted and hexasubstituted monomers for cross-coupling reactions, a two-dimensional conjugated carbon framework with all molecular channels being rhombic is precisely constructed, synthesizing a graphyne-like carbon material with all molecular channels being rhombic.

The application discloses application of amido functionalized graphdiyne quantum dots in preparation of a two-dimensional perovskite solar cell and belongs to the technical field of photovoltaic devices. The amido functionalized graphdiyne quantum dots contain amido groups and hydroxyl groups simultaneously; the particle size of the amido functionalized graphdiyne quantum dots is 1-4 nm; and the two-dimensional perovskite solar cell is prepared by doping the amido functionalized graphdiyne quantum dots into a two-dimensional perovskite light absorption layer. The application constructs a kind of nanomaterial with structural regulation and functional modification, realizes the synergistic optimization of the crystal growth orientation of the perovskite light absorption layer, the carrier transport behavior and the film stability, and thus significantly improves the overall performance of the photovoltaic device.

The application relates to a preparation method of a polyamide composite nanofiltration membrane containing a graphdiyne intermediate layer and application thereof, and belongs to the field of membrane separation and technology. The polyamide composite nanofiltration membrane contains a porous substrate, a graphdiyne intermediate layer and a polyamide layer. The graphdiyne is selected from graphyne, graphdiyne, hydrogen-substituted graphdiyne and other graphdiyne derivatives. The specific preparation method is as follows: a graphdiyne dispersion liquid is suction-filtered onto a porous substrate, is respectively immersed in an aqueous phase and an oil phase, interfacial polymerization is carried out to generate a polyamide membrane, finally, the membrane is dried in a constant-temperature and constant-humidity oven, and a polyamide composite nanofiltration membrane containing a graphdiyne intermediate layer is obtained. The preparation method is simple and efficient, the prepared composite membrane can effectively intercept divalent salts and organic matters in water, and has excellent water permeability, ion separation and antibiotic desalination effect.

A method for the synthesis of multilayer γ-graphyne, an intrinsically semi-conducting sp2 / sp1 allotrope of carbon, through crystallization-assisted irreversible cross-coupling polymerization.

The application belongs to the technical field of electronic circuits, and particularly relates to a high-order topological insulator circuit design method based on graphdiyne structure. The method comprises the following steps: (1) establishing an LC circuit model of a two-dimensional rhombus-shaped graphdiyne structure; (2) obtaining the admittance matrix of the circuit according to the Kirchhoff equation, solving the matrix eigenvalues and eigenvectors by using MATLAB, and obtaining the admittance band structure; (3) changing the size of the capacitance proportion parameter, so that the topological phase transition of the circuit system can be realized; (4) in the topological non-trivial phase parameter region, the impedance distribution under different frequencies is calculated, and it can be observed that the system has zero energy angle state, i.e. second-order topological state; (5) the impedance distribution under a specific frequency is measured, and it is observed in the experiment that the topological angle state is localized in the obtuse angle or acute angle region of the rhombus-shaped circuit board, and the system has high-order topological properties.

The application provides a graphdiyne hollow multi-shell material and a preparation method and application thereof, and comprises the following steps: (1) preparing a metal oxide hollow multi-shell; (2) reducing the metal oxide hollow multi-shell to obtain a metal hollow multi-shell; (3) in-situ growth preparation of a metal / graphdiyne hollow multi-shell material in a reaction solution by taking the metal hollow multi-shell as a template; and (4) finally, the metal hollow multi-shell template is removed by etching to prepare the graphdiyne hollow multi-shell material. According to the preparation method, the metal oxide hollow multi-shell can be converted into the metal hollow multi-shell while the morphology is kept through reduction, and the graphdiyne can be formed on the inner and outer surfaces of each layer of the metal hollow multi-shell through the in-situ growth method, and the graphdiyne hollow multi-shell is obtained after etching the metal template, and the graphdiyne hollow multi-shell can be used as a photothermal material for heavy metal ions and radioactive metal ion purification in water.

The application discloses to belong to the technical field of lithium ion battery, specifically relates to a kind of fast charging graphite negative electrode material, its preparation method and lithium ion battery, and lithium ion battery negative electrode material is graphene / carbon nanotube composite and graphdiyne modified graphite, graphene / carbon nanotube composite and graphdiyne are coated on the surface of graphite particle, and the mass percentage of graphene / carbon nanotube composite in modified graphite is 0.1-1%;The mass percentage of graphdiyne in modified graphite is 0.05-0.5%.In graphene / carbon nanotube composite, the mass ratio of graphene and carbon nanotube is 1:1~5:1.The fast charging graphite negative electrode material can effectively improve the safety performance of the battery while improving the fast charging performance.

The application discloses a high-temperature-resistant and wear-resistant polycrystalline cubic boron nitride composite sheet and a preparation method thereof, and belongs to the technical field of superhard materials. The polycrystalline cubic boron nitride composite sheet comprises a hard alloy base body, a transition composite coating arranged on the hard alloy base body, a powder transition layer arranged on the transition composite coating, and a polycrystalline cubic boron nitride layer arranged on the powder transition layer. The polycrystalline cubic boron nitride layer is composed of the following raw materials in percentage by weight: alumina-coated cubic boron nitride micropowder 40-55%, cubic boron nitride micropowder 25-30%, submicron cubic boron nitride micropowder 5-10%, graphyne 0.2-0.4%, fullerene 0.2-0.4% and a binder 14.6-19.2%. The transition composite coating is deposited on the surface of the hard alloy base body by using a magnetron sputtering method, and the powder transition layer is arranged between the transition composite coating and the polycrystalline cubic boron nitride layer, so that the interface stress between the polycrystalline cubic boron nitride layer and the hard alloy base body is reduced, the bonding strength of the polycrystalline cubic boron nitride layer and the hard alloy base body is improved, and the polycrystalline cubic boron nitride layer has excellent mechanical and thermal properties.

The application discloses a method for selectively synthesizing methyl formate by catalytic ozonation of methanol at ultralow temperature by using a graphdiyne catalyst, and belongs to the technical field of fine chemical engineering. The method comprises the following steps: using graphdiyne as a catalyst, and performing a catalytic reaction in a mixed gas atmosphere containing methanol and ozone to selectively synthesize methyl formate; the temperature of the catalytic reaction is-25-25 DEG C; the concentration of methanol in the mixed gas atmosphere is 3000-10000 ppm; and the concentration of ozone in the mixed gas atmosphere is 750 ppm. The activity test results show that the graphdiyne catalyst has a methyl formate selectivity of 92% and a 16-cycle test stability at ultralow temperature (25 DEG C). In the method, the graphdiyne catalyst does not need to be activated, has high catalytic activity, and contains no metal, so that no environmental pollution is caused.

The application belongs to the field of nano new energy materials, and discloses a preparation method of BaTiO3 / GDY / Au piezoelectric enhanced photocatalyst and application thereof. The catalyst is prepared by first synthesizing barium titanate nanofibers with piezoelectric effect through an electrospinning method, then growing thin graphdiyne nanosheets on the surface of the barium titanate, and finally growing gold nanoparticles with a local surface plasmon resonance effect on the surface of the graphdiyne to obtain barium titanate / graphdiyne / gold nanofibers. Under the combined stimulation of light and ultrasound, the barium titanate / graphdiyne / gold nanofiber catalyst can promote the generation of a large number of active oxygen free radicals, thereby removing organic pollutants and pathogens in wastewater. The application can solve the problems of low catalytic activity and poor stability of the catalyst, and can quickly remove organic pollutants and pathogens in wastewater.

The invention discloses a nano biosensor based on functionalized graphdiyne, construction of the nano biosensor and application of the nano biosensor in bacterial extracorporeal vesicle detection, and belongs to the technical field of nano biosensors. The invention relates to a nano biosensor based on functionalized graphdiyne (GDY). The nano biosensor comprises GDY-metal oxide nano enzyme, graphdiyne is used as a substrate material, and metal oxide nanoparticles are loaded on the surface of the substrate material to form the heterogeneous composite material with a stable structure. According to the sensor, through rational design of a GDY-based nano sensing interface, efficient capture of bacterial extracellular vesicles is realized under the condition of not depending on ultracentrifugation, and eukaryotic extracellular vesicles and bacterial-derived extracellular vesicles are effectively distinguished. In order to reduce the detection cost, various metal nanoparticles are adopted for functional modification, and the capture process can be completed without using expensive biological recognition molecules.

According to the invention, hydrogen-substituted graphdiyne (HsGDY) is used as a carrier of polyphthalocyanine iron (FePPc) molecules, ordered double acetylenic bonds of the hydrogen-substituted graphdiyne (HsGDY) are used as coordination sites, and the polymerization degree of FePPc growing along a HsGDY two-dimensional plane is controlled through d-pi interaction with Fe-N4 sites, so that the interlayer stacking behavior of the HsGDY is inhibited; therefore, the hydrogen-substituted graphdiyne-loaded small-size polyphthalocyanine iron (HsGDY and FePPc) composite nano array electrode with a high exposure degree and a stable electrochemical interface is formed. Key points are that the HsGDY can promote enrichment and conversion of nitrate radicals and electrons on an interface of the HsGDY and FePPc; the double acetylenic bond can be used as an active site for catalytic conversion of NO3 <-> to NO2 <->, and the conversion of NO2 <-> from a polyphthalocyanine iron Fe-N4 site to NH2OH is promoted; the double acetylenic bonds interact with d-pi of the Fe-N4 site, so that the adsorption energy of NH2OH at the Fe-N4 site can be reduced, the desorption of NH2OH is promoted, and the HsGDY-coated FePPc composite molecular catalyst with series catalytic action is obtained.

The application discloses the technical field of lithium ion batteries, and particularly relates to a lithium ion battery negative electrode material, a preparation method thereof and a lithium ion battery. The lithium ion battery negative electrode material is graphene and graphdiyne modified graphite. Graphene and graphdiyne are coated on the surface of graphite particles. The mass percentage of graphene in the modified graphite is 0.1-1%. The mass percentage of graphdiyne in the modified graphite is 0.05-0.5%. The lithium ion battery negative electrode material can improve the fast charging performance and effectively improve the safety performance of the battery.

The present application relates to graphdiyne coated sulfur-doped modified carbon negative electrode material and its preparation method and application. The preparation method of the carbon negative electrode material: glucose solution is hydrothermally treated to obtain black powder, the black powder and sulfur powder are mixed, and carbonization is carried out under inert atmosphere to obtain C-S material; the obtained C-S material is dispersed in a solvent, heated and reacted to obtain a reaction liquid; then HEB graphdiyne monomer solution is added to the reaction liquid to obtain a reaction mixture; the obtained reaction mixture is heated and reacted in an inert atmosphere under light shielding conditions to obtain the carbon negative electrode material. The present application provides a carbon negative electrode material which is synergistically modified by sulfur doping and graphdiyne coating and has stable structure and excellent electrochemical performance. The graphdiyne coating layer can inhibit the volume expansion during charging and discharging, enhance the structural stability, and provide additional lithium storage sites, realizing long-life cycle under fast-charging conditions.

This invention proposes a graphyne / gold nanocomposite material, its preparation method, and its application. The graphyne / gold nanocomposite material comprises graphyne and gold nanoparticles loaded on its surface. Graphyne can enrich the gold nanoparticles, and the gold nanoparticles loaded on the graphyne can generate a localized surface plasmon resonance effect, thereby providing a SERS signal response. The substrate of this invention exhibits good SERS signal response to dyes and plant toxins, and the substrate enhancement effect is stable and highly reproducible, ensuring the accuracy and reliability of the detection results. This invention also proposes the application of the above-mentioned graphyne / gold nanocomposite material as a surface-enhanced Raman scattering substrate for detecting isoxazole / tryptamine toxins in mushrooms. This enables rapid detection of psilocybin and amatoxins in complex matrices of fungal samples; it can be used for rapid screening of highly poisonous mushrooms and their products in food safety, showing significant application prospects.

The invention discloses a graphdiyne-induced metastable lattice distortion sulfur quantum dot material as well as a preparation method and application thereof. In-situ growth of the sulfur lattice distortion sulfur quantum dots on a crystalline graphdiyne matrix is realized by adopting a melting-pouring strategy, and ground crystalline graphdiyne / solid sulfur powder is heated to 155 DEG C in an argon atmosphere. The generation of lattice distortion sulfur quantum dots is jointly induced by strong C-S bond and lattice mismatch between crystalline hollow graphdiyne and solid sulfur. Due to the small size and metastable state characteristics of the lattice distortion sulfur quantum dots, the conductivity of sulfur is remarkably enhanced, the sulfur redox reaction energy barrier is reduced, and then the reaction kinetics is improved. The material, as a sulfur positive electrode material of a lithium-sulfur battery, shows excellent electrochemical characteristics: under high sulfur area load, can obtain area capacity of 35.7 mAhcm <-2 >, and has excellent cycle stability; the assembled lithium-sulfur soft package battery can realize excellent mass energy density and volume energy density, and the capacity retention ratio is 98% after 200 cycles.

This invention discloses a divalent rare earth-graphyne composite material, its preparation method, and its application in thermocatalytic ammonia production, belonging to the field of catalyst materials technology. The divalent rare earth-graphyne composite material comprises rare earth ions, iodide ions, and graphyne material. The rare earth ions are selected from at least one divalent ion of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, and yttrium. The rare earth ions and iodide ions exist on the surface of the graphyne material in the form of nanoparticles. This divalent rare earth-graphyne composite material achieves thermocatalytic ammonia production under mild conditions through the interaction of rare earth nanoparticles and oxygen-containing functional groups on the graphyne surface, and is expected to become a new generation of high-performance thermocatalytic ammonia production catalyst.

Disclosed is a light-emitting device, a preparation method, and a display panel. The light-emitting device includes an anode layer and a cathode layer disposed opposite to each other, a light-emitting layer disposed between the anode layer and the cathode layer, and a first interface-modifying layer disposed between the light-emitting layer and the anode layer. The first interface-modifying layer includes a thiophene-based polymer and a graphyne doped in the thiophene-based polymer and includes a first sub-layer close to the light-emitting layer and a second sub-layer close to the anode layer, and a doping ratio of the graphyne in the first sub-layer is greater than a doping ratio of the graphyne in the second sub-layer.

The invention relates to a perovskite / graphdiyne heterojunction-based self-powered photoelectric synaptic device and a preparation method thereof. The self-powered photoelectric synapse device based on the perovskite / graphdiyne heterojunction comprises a substrate, a bottom electrode, a graphdiyne layer, a perovskite layer, a passivation protection layer and a metal top electrode. The photoelectric synapse device with a self-powered function is obtained through the perovskite / graphdiyne heterojunction, good self-powered photoelectric response is obtained by utilizing the photovoltaic characteristic of the perovskite layer, and stable biosynapse-like performance is obtained by utilizing the unique chemical structure of the graphdiyne layer. The perovskite / graphdiyne heterojunction photoelectric synapse device constructed by the invention can realize bionic photoelectric synapse performance in a zero-voltage bias state, and the application of perovskite and graphdiyne materials in neuromorphic photoelectric devices is enriched.

The application discloses a graphdiyne anticorrosive paint and a preparation method and application thereof. The graphdiyne anticorrosive paint comprises components A and B. The component A comprises epoxy resin, fluorosilane modified graphdiyne nanosheet, epoxy functionalized nanosilica, pigment and filler, wetting dispersant, rheological aid and a first solvent. The component B comprises a curing agent and a second solvent. By simultaneously introducing the fluorosilane modified graphdiyne nanosheet and the epoxy functionalized nanosilica into the anticorrosive paint, the anticorrosive performance of the paint is significantly improved through the space synergy of the graphdiyne two-dimensional sheet layer and the zero-dimensional nanosilica particle, the interface enhancement of chemical bonding and the passivation performance synergy. The anticorrosive paint has the advantages of strong adhesion, excellent salt spray resistance and good hydrophobicity.

The present application relates to the technical field of lubricating oil, and particularly relates to a nano-graphite lubricating oil and a preparation method thereof. Specifically, the nano-graphite lubricating oil is composed of PAO and nano-graphite, wherein the nano-graphite is composed of graphene modified CeO2 nanosheet and MoS2 graphdiyne composite; the mass percentage of the graphene modified CeO2 nanosheet in the nano-graphite lubricating oil is 1% to 3%, the mass percentage of the MoS2 graphdiyne composite is 1% to 3%, and the rest is PAO. In the present application, the graphene modified CeO2 nanosheet and the MoS2 graphdiyne composite are combined with PAO to form a nano-graphite lubricating oil formula, which helps to reduce the energy consumption of mechanical equipment, improve the operation efficiency and reliability of the mechanical equipment, and prolong the service life of the mechanical equipment.